dmaengine: uniphier-mdmac: use devm_platform_ioremap_resource()

Replace the chain of platform_get_resource() and devm_ioremap_resource()
with devm_platform_ioremap_resource().

This allows to remove the local variable for (struct resource *), and
have one function call less.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Link: https://lore.kernel.org/r/20190905034133.29514-1-yamada.masahiro@socionext.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/dma/uniphier-mdmac.c

@@ -382,7 +382,6 @@ static int uniphier_mdmac_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct uniphier_mdmac_device *mdev;
 	struct dma_device *ddev;
-	struct resource *res;
 	int nr_chans, ret, i;
 
 	nr_chans = platform_irq_count(pdev);
@@ -398,8 +397,7 @@ static int uniphier_mdmac_probe(struct platform_device *pdev)
 	if (!mdev)
 		return -ENOMEM;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	mdev->reg_base = devm_ioremap_resource(dev, res);
+	mdev->reg_base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(mdev->reg_base))
 		return PTR_ERR(mdev->reg_base);